Single-crystalline Ni(OH)2 and NiO nanoplatelet arrays as supercapacitor electrodes

Vertically aligned Ni(OH)2 and NiO single-crystalline nanoplatelet arrays were directly grown on the fluorine-doped tin oxide (FTO) substrate by a simple hydrothermal method. The effects of the hydrothermal parameters on the morphology and crystal structure of the nanoarray film were investigated. C...

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Bibliographic Details
Published in:Nanoscale 2011-01, Vol.3 (12), p.5103-5109
Main Authors: Li, Jiangtian, Zhao, Wei, Huang, Fuqiang, Manivannan, Ayyakkannu, Wu, Nianqiang
Format: Article
Language:English
Subjects:
Alignment
Arrays
Electrodes
Morphology
Nanocomposites
Nanomaterials
Nanostructure
Single crystals
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Summary:Vertically aligned Ni(OH)2 and NiO single-crystalline nanoplatelet arrays were directly grown on the fluorine-doped tin oxide (FTO) substrate by a simple hydrothermal method. The effects of the hydrothermal parameters on the morphology and crystal structure of the nanoarray film were investigated. Controlling the ammonia and persulfate concentrations was the key to controlling the morphology of the nanoarray film. The experimental results showed that the single-crystalline NiO nanoplatelet array was a promising candidate for the supercapacitor electrode. It exhibited a high specific capacitance, prompt charge/discharge rate, and good stability of cycling performance. It is believed that the vertically oriented aligned single-crystalline NiO nanoplatelet array is beneficial to the charge transfer in the electrode and to the ion transport in the solution during redox reaction.
ISSN:2040-3364
2040-3372
DOI:10.1039/c1nr10802f